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Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com
W
att
Installation and Operation Manual
N
ode
WattNode Modbus
Models
● WNC-3Y-208-MB
● WNC-3Y-400-MB
● WNC-3Y-480-MB
● WNC-3Y-600-MB
● WNC-3D-240-MB
● WNC-3D-400-MB
● WNC-3D-480-MB
M
odbus
®
WattNode Revenue for
Modbus Models
● RWNC-3Y-208-MB
● RWNC-3Y-400-MB
● RWNC-3Y-480-MB
● RWNC-3Y-600-MB
● RWNC-3D-240-MB
● RWNC-3D-400-MB
● RWNC-3D-480-MB
Rev 1.18c
(M7)
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Table of Contents
Related Manuals for CCS WattNode WNC-3Y-208-MB
Summary of Contents for CCS WattNode WNC-3Y-208-MB
- Page 1 Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com odbus ® Installation and Operation Manual WattNode Modbus WattNode Revenue for Models Modbus Models ● WNC-3Y-208-MB ● RWNC-3Y-208-MB ● WNC-3Y-400-MB ● RWNC-3Y-400-MB ● WNC-3Y-480-MB ● RWNC-3Y-480-MB ●...
- Page 2 This equipment has been tested and complies with the limits for a Class B digital device, pursu- ant to part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
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Page 3: Table Of Contents
Contents Overview ..........................5 Measurements ..........................5 Communication ..........................5 Diagnostic LEDs ..........................5 Options ............................5 Current Transformers ........................6 Additional Literature ......................... 6 Front Label ............................7 Installation ..........................9 Precautions ............................. 9 Electrical Service Types ........................10 Single-Phase Two-Wire with Neutral ..................10 Single-Phase Three-Wire (Mid-Point Neutral) ................11 Single-Phase Two-Wire without Neutral ..................12 Three-Phase Four-Wire Wye .....................13... - Page 4 Advanced Register List - Integer ....................36 Configuration Register List .......................37 Communication Register List ....................38 Diagnostic Register List ......................38 Option Information Registers ....................39 Custom Register Map ......................39 Basic Registers ..........................40 Energy Registers ........................40 Power Registers ........................40 Voltage Registers ........................41 Frequency ..........................41 Advanced Registers ........................41...
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Page 5: Overview
Overview Congratulations on your purchase of the WattNode Modbus watt/watt-hour transducer (meter). ® ® The WattNode meter offers precision energy and power measurements in a compact pack- age. It enables you to make power and energy measurements within existing electric service panels avoiding the costly installation of subpanels and associated wiring. -
Page 6: Current Transformers
● Option CT=xxx/yyy/zzz - Pre-assign xxx to CtAmpsA, yyy to CtAmpsB, and zzz to CtAmpsC. Communication Options ● Option EP - Factory configure the Modbus RS-485 communications to even parity (E81). ● Option 19K - Factory configure the RS-485 communications 19,200 baud. Position 8 of the DIP switch will be ignored. -
Page 10: Electrical Service Types
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com Electrical Service Types Below is a list of service types, with connections and recommended models. Note: the ground connection improves measurement accuracy, but is not required for safety. Line-to- Meter Electrical... -
Page 15: Mounting
The WattNode meter will correctly measure services with a grounded leg, but the measured volt- age and power for the grounded phase will be zero and the status LED will not light for whichever phase is grounded, because the voltage is near zero. Also, one or both of the active (non- grounded) phases may indicate low power factor because this type of service results in unusual power factors. -
Page 16: Selecting Current Transformers
over-tightening which can crack the case. If you don’t use the supplied screws, the following sizes should work (bold are preferred); use washers if the screws could pull through the mounting holes Screw Style U.S.A. UTS Sizes Metric Sizes Pan Head or Round Head #6, #8, #10 M3.5, M4, M5 Truss Head... -
Page 18: Circuit Protection
● The line voltage connections should be made with wire rated for use in a service panel or junction box with a voltage rating sufficient for the highest voltage present. CCS recommends 14 or 12 AWG (1.5 mm or 2.5 mm... -
Page 19: Connecting Voltage Terminals
Connecting Voltage Terminals Always turn off or disconnect power before connecting the voltage inputs to the meter. Con- nect each phase voltage to the appropriate input on the green terminal block; also connect ground and neutral (if required). The voltage inputs to the meter do not need to be powered from to the same branch circuit as the load being monitored. -
Page 20: Baud Rate
DIP Switch Up (1) Value Address Examples Down Down Down Down Down Down 1+2+4 = 7 Down Down Down Down 4+16 = 20 Down Down Down Down Down 1+2+16+32+64 = 115 Down Down Table 3: Modbus Address Selection For example, if DIP switch positions 3 and 5 are in the 1 (up) position and the rest are 0 (down), the resulting Modbus address is 4 + 16 = 20. - Page 21 wire back to the PC or logger). For best results, especially for longer distances, use wire recom- mended for RS-485. Manufacturer Part Number Pairs Shielded? Impedance Insulation Belden 9841 120 ohms 300 V Belden 9842 120 ohms 300 V many CAT 5, 5e Optional 100 ohms...
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Page 22: Installation Summary
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com Wiring Once you’ve planned the network and strung the cable, you can connect the WattNode meters. ● The Modbus terminals (A-, B+, C, and X) are completely isolated (4500 Vac RMS isolation) from dangerous voltages, so you can connect them with the meter powered. -
Page 23: Installation Led Diagnostics
Installation LED Diagnostics The WattNode meter includes multi-color power diagnostic LEDs for each phase to help verify correct operation and diagnose incorrect wiring. The LEDs are marked “Status” on the label. The following diagrams and descriptions explain the various LED patterns and their meanings. The A, B, and C on the left side indicate the phase of the LEDs. - Page 24 ● The CT wires are connected to the wrong inputs, such as if the CT wires for phases B and C are swapped or the CT wires are rotated one phase. Note: if all three LEDs are flashing red and they always turn on and off together, like the diagram for Low Line Voltage below, then the meter is experiencing an error or low line voltage, not nega- tive power.
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Page 25: Other Fixed Pattern
it occurs due a momentary surge, but if the line voltage is high continuously, the power supply may fail. If you see continuous over-voltage flashing, disconnect the meter immediately! Check that the model and voltage rating is correct for the electrical service. Bad Line Frequency Yellow If the meter detects a power line frequency below 45 Hz... - Page 26 ● If one or more voltages are too low (by more than 5%), then make sure you have the correct model. For example, a WNC-3Y-208-MB expects line-to-neutral voltages of 120 Vac and can measure up to about 150 Vac. If you apply 208 Vac line-to-neutral, the WattNode meter will read a voltage in the 150 Vac to 180 Vac range.
- Page 27 ○ Our current transformers can only measure AC currents. Strong DC currents will saturate the magnetic core of the CT, preventing an accurate measurement of the AC current. The overwhelming majority of AC powered electric devices do not draw significant DC current, so this is a rare occurrence.
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Page 28: Modbus Communication Diagnostics
Modbus Communication Diagnostics The “Com” LED indicates many Modbus communication conditions by lighting green, yellow, or red. Other Modbus errors are indicated by returning a Modbus exception response to the master and by saving an error code to the ErrorStatus registers. Modbus Idle Whenever the Modbus network is idle, the Com LED will stay off. - Page 29 Invalid Request Green 0.2s If the WattNode Modbus meter receives a valid packet, but with an invalid request (see below), then the meter will respond with a Modbus exception mes- sage and store an error in the ErrorStatus registers. Because the packet was valid, Com LED will flash green for 200 milliseconds.
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Page 30: Operating Instructions
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com Operating Instructions Quick Start To start communicating with a WattNode Modbus meter using a PC, you’ll need to complete the following steps: ● Set the Modbus address and baud rate using the DIP switches (see Setting the Modbus Address (p. -
Page 31: Measurement Overview
Measurement Overview The WattNode meter performs measurements every one second. The measurements are used to update three types of registers: ● Energy registers: These accumulate up (or sometimes down) based on the consumed energy during each measurement period. Energy values are preserved across power failures. ●... -
Page 32: Modbus Register Lists
Report Slave ID The report slave ID function returns the following standard packet: Name Length Value Description Address 1 byte Varies Modbus Address of the meter Function Code 1 byte 0x11 Report Slave ID function code Byte Count 1 byte Varies Number of bytes in Slave ID, Run Indicator Status, and Additional Data... -
Page 33: Floating Point And Integer Registers
packet), so the actual register number that appears on the RS-485 bus will be “1000” (or in hexadecimal, 0x03E8). ● A common Modbus convention adds the function code as a leading digit on the register number, so a register like EnergySum (1001) would be documented as 41001. All input reg- isters (function code 04) would use the form 4xxxx, while holding registers (function code 03) would use the form 3xxxx. -
Page 34: Basic Register List - Floating Point
Basic Register List - Floating Point The following registers provide the most commonly used measurements in floating point units. See Basic Registers (p. 40) below for detailed information. Registers Name Units Description Energy Registers 1001, 1002 EnergySum* Total net (bidirectional) energy †... -
Page 35: Advanced Register List - Floating Point
Registers Name Units Description Voltage Registers 1213 VoltAvgLN 0.1 V Average line-to-neutral voltage 1214 VoltA 0.1 V RMS voltage, phase A to neutral 1215 VoltB 0.1 V RMS voltage, phase B to neutral 1216 VoltC 0.1 V RMS voltage, phase C to neutral 1217 VoltAvgLL 0.1 V... -
Page 36: Advanced Register List - Integer
Registers Name Units Description Reactive and Apparent Power Registers 1147, 1148 PowerReacSum Reactive power, sum of active phases 1149, 1150 PowerReacA Reactive power, phase A 1151, 1152 PowerReacB Reactive power, phase B 1153, 1154 PowerReacC Reactive power, phase C 1155, 1156 PowerAppSum Apparent power, sum of active phases 1157, 1158... -
Page 37: Configuration Register List
Registers Name Units Description 1335, 1336 EnergyAppB* 0.1 kVAh Apparent energy, phase B † 1337, 1338 EnergyAppC* 0.1 kVAh Apparent energy, phase C † Power Factor Registers 1339 PowerFactorAvg 0.01 Power factor, average 1340 PowerFactorA 0.01 Power factor, phase A 1341 PowerFactorB 0.01... -
Page 38: Communication Register List
Registers Name Units Default Description 1610 DemPerMins* 1 minute Demand period (1 to 720) 1611 DemSubints* Number of demand subintervals (1 to 10) 1612 GainAdjustA* 1/10000th 10000 ØA power/energy adjustment (5000 to 20000) 1613 GainAdjustB* 1/10000th 10000 ØB power/energy adjustment (5000 to 20000) 1614 GainAdjustC* 1/10000th 10000... -
Page 39: Option Information Registers
Registers Name Units Description 1712 CrcErrorCount Count of Modbus CRC communication errors 1713 FrameErrorCount Count of Modbus framing errors 1714 PacketErrorCount Count of bad Modbus packets 1715 OverrunCount Count of Modbus buffer overruns 1716 ErrorStatus1 n.a. Newest error or event (0 = no errors) 1717 ErrorStatus2 n.a. -
Page 40: Basic Registers
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com Basic Registers Energy Registers Commonly known as kWh (kilowatt-hours), the energy is the integral of power over time. Many installations will only use the energy measurement. It is commonly used for billing or sub-meter- ing. -
Page 41: Voltage Registers
PowerSum This is the sum of the real power for active phases (line voltage above 20% of nominal). This can include negative values, so if one phase is negative, it will reduce the reported PowerSum. Voltage Registers All integer voltage registers are reported in units of 0.1 VAC, so 1234 = 123.4 VAC. VoltAvgLN This is the average line-to-neutral voltage (average of VoltA, VoltB, and VoltC). -
Page 42: Negative Energy
These values are reset to zero when “1” is written to the ZeroEnergy register. You may also reset them to zero or load preset values by writing to these registers. Negative Energy The negative energy registers are exactly like the positive energy registers except they accumulate negative energy. -
Page 43: Reactive Power
The WattNode meter measures the displacement or fundamental power factor, which does not include harmonics. Integer power factor registers are reported in units of 0.01, so 85 equals a power factor of 0.85. PowerFactorA, PowerFactorB, PowerFactorC These are the power factor values for each phase. PowerFactorAvg This is the average power factor, computed as PowerSum / ApparentPowerSum. -
Page 45: Demand
one (or zero) results in the standard demand measurement without rolling demand. See Configu- ration Registers for information on configuring the demand. Any changes to the demand configuration (DemPerMins, DemSubints) or CT configuration (CtAmps, CtAmpsA, CtAmpsB, CtAmpsC, CtDirections) will zero the reported demand and start a new demand measurement. -
Page 46: I/O Pin Options
register. Note: there are no minimum or maximum demand registers for DemandA, DemandB, and DemandC. DemandMax The DemandMax is the largest measured Demand. It is preserved across power failures and can be reset with the ZeroDemand register. DemandApp DemandApp is computed the same way as Demand, but using apparent power. I/O Pin Options IoPinState, PulseCount For details about the I/O pin options registers and configuration, see the Continental Control... - Page 47 You can order the meter from the factory with the CtAmps preconfigured using Option CT=xxx or Option CT=xxx/yyy/zzz if there are different CTs on phases A, B, and C. For example, Option CT=100/100/50 sets CtAmpsA = 100, CtAmpsB = 100, and CtAmpsC = 50. The specified rated CT amps for each phase (CtAmpsA, CtAmpsB, and CtAmpsC), affect the scaling CurrentIntScale for the integer current registers CurrentA, CurrentB, and CurrentC.
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Page 48: Demand Configuration
PowerIntScale (1609) In order to report power as an integer value (±32,767), the meter must scale the power so that it doesn’t overflow. By default, the WattNode meter selects a PowerIntScale value of 1, 10, 100, or 1000 whenever the CtAmps (or CtAmpsA, CtAmpsB, or CtAmpsC) are changed. The meter selects a value that won’t overflow unless the power exceeds 120% of full-scale. -
Page 49: Zeroing Registers
PhaseAdjustA, PhaseAdjustB, PhaseAdjustC (1615, 1616, 1617) For maximum accuracy, there may be cases where you wish to compensate for the phase angle error of the current transformers you are using. The PhaseAdjust registers allow the phase angle to be adjusted on each phase by up to ±8 degrees in increments of one millidegree. For example, if your CT causes a phase lead of 0.6 degrees (or 36 minutes), you could correct for this by setting PhaseAdjustA, B, and C to -600, which subtracts 600 millidegree or 0.6 degree from the phase lead. -
Page 50: I/O Pin Options Configuration
As a security measure, there are three non-resettable energy registers—EnergySumNR, EnergyPosSumNR, EnergyNegSumNR—that can never be reset to zero. ZeroDemand (1621) The ZeroDemand register can be written with three values (or zero which does nothing). If a ConfigPasscode has been set, then you must unlock the meter before you can zero demand. ●... -
Page 51: Diagnostic Registers
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, Woburn MA 01801 - TestEquipmentDepot.com The meter can be ordered with Option 19K or Option 38K to preconfigure the baud rate to 19.200 or 38,400 baud. See Baud Rate (p. 20) for details. ParityMode (1654) The WattNode Modbus meter defaults to no parity, eight data bits, and one stop bit, but even parity is supported using this register, or by ordering Option EP to preconfigure even parity... -
Page 52: Error Codes
Model (1707) This register can be used to determine the WattNode model. ● 201 - WNC-3Y-208-MB ● 202 - WNC-3Y-400-MB ● 203 - WNC-3Y-480-MB ● 204 - WNC-3Y-600-MB ● 205 - WNC-3D-240-MB ● 206 - WNC-3D-400-MB ● 207 - WNC-3D-480-MB Version (1708) This reports the WattNode Modbus meter firmware version. - Page 53 ErrorStatus1 through ErrorStatus8 also list the eight most recent errors, but with a few dif- ferences. ErrorStatus1 lists the most recent error or status, while ErrorStatus8 lists the oldest. Reading these registers won’t change the reported values for ErrorStatus1 through ErrorStatus8, so they can be read repeatedly without clearing the values.
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Page 54: Maintenance And Repair
The WattNode meter is not user serviceable. In the event of any failure, the meter must be returned for service (contact CCS for an RMA). In the case of a new installation, follow the diag- nostic and troubleshooting instructions before returning the meter for service, to ensure that the problem is not connection related. -
Page 55: Specifications
WattNode models use the phase A and phase B connections for power. Table 12: WattNode Models Model Options Any of these models are available with the following options. See the CCS website WattNode Modbus - Options page for details. General Options... -
Page 56: Accuracy
X Terminal Options These options all utilize the X (auxiliary) terminal on the MODBUS connector: X5: Provides 5 Vdc at up to 60 milliamps between the C (common) and X (5 V) terminals. Option Output Voltage: 5 Vdc ± 5% Minimum Output Current: 0 mA Maximum Output Current: 60 mA Maximum Short-Circuit Output Current: 150 mA... -
Page 57: Measurement
Additional Error: ±0.5% of reading Condition 6 ‑ Temperature Variation All conditions the same as Condition 1 except: Ambient Temperature: -30°C to +55°C Additional Error: ±0.75% of reading Measurement Creep Limit: 0.10% (1/1000th) of full-scale. Whenever the power or reactive power for a phase drops below the creep limit, the power or reactive power for the phase will be forced to zero. -
Page 58: Electrical
Receiver Sensitivity: ±200 mV Receiver Bus Load: 1/8 unit load (up to 256 WattNode meters per subnet) Receiver Failsafe Modes: bus open, bus shorted, bus idle Electrical Power Consumption: The following table shows typical power consumption and power factor values with all three phases powered at nominal line voltages. The power supply draws most of the total power consumed, while the measurement circuitry draws 1-10% of the total (6-96 milliwatts per phase, depending on the model). -
Page 59: Certifications
Certifications Safety: UL 61010-1; CAN/CSA-C22.2 No. 61010-1-04; IEC 61010-1 Immunity: EN 61326: 2002 (Industrial Locations) Electrostatic Discharge: EN 61000-4-2: 4 kV contact, 8 kV air: (B) Self-Recovering Radiated RF Immunity: EN 61000-4-3: 10 V/m: (A) No Degradation Electrical Fast Transient / Burst: EN 61000-4-4: 2 kV: (B) Self-Recovering Surge Immunity: EN 61000-4-5: 1 kV I/O, 4 kV AC: (B) Self-Recovering Conducted RF Immunity: EN 61000-4-6: 3 V: (A) No Degradation Voltage Dips, Interrupts: EN 61000-4-11: (B) Self-Recovering... -
Page 60: Warranty
Customer acknowledges that CCS’s aggregate liability to Customer relating to or arising out of the sale or use of CCS’s products, whether such liability is asserted on the basis of contract, tort or otherwise, shall not exceed the purchase price paid by Customer for the products in respect of which damages are claimed.
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